ABC’s “This Week” _ Retired Gen. Wesley Clark, former NATO supreme commander; Bob Maginnis, national security analyst with the Family Research Council; R. Clarke Cooper, executive director of Log Cabin Republicans; Elaine Donnelly, president of the Center for Military Readiness; Tammy Schultz, director of National Security and Joint Warfare at the Marine Corps War College; former national security adviser Zbigniew Brzezinski; former U.S. Ambassador to Afghanistan Zalmay Khalilzad; Sakena Yacoobi, executive director of the Afghan Institute of Learning.